Labels:text | diagram | font | screenshot | line OCR: (4) CFastString a = b + c+d; (6) CStringSum<CStringSum<CFastString, CFastString>,CFastString> b d (=) : CStringSums > CStringSums CFastString d CFastString CFastString b (a) The assignment expression. (b) The type of the rvalue. (c) The expression tree defined by the type. Figure 2: The expression template parse tree